Transferring a two-dimensional lattice onto another with a small rotation \(\theta \)  gives rise to a moiré superlattice with lattice constant \(a_M=a_0/(2\sin (\theta /2))\)  that is much larger than the single layer lattice constant \(a_0\)  (see Figure REF a). The capability to fabricate twisted 2D bilayers such as graphene or \(\text{MoS}_2\)  with precise control of small twist angles as low as \(\theta \approx .1^\circ \)  or smaller has opened a new era in the development and design of materials with previously inaccessible electronic, magnetic, and optical properties. For example, the discovery of Mott insulator and superconducting electronic phases in twisted bilayer graphene at the “magic angle” of \(\theta =1.05^\circ \)  [1]}, [2]} has led to a new era in the investigation of strongly correlated electronic and magnetic phases.
